Its 10 kA breaking capacity at 400 V AC (per EN 60898) and 10 kA at DC (per EN 60898-2) means it safely interrupts fault currents up to that level without welding contacts or cascading upstream. The universal-current design lets it switch AC or DC loads, though at DC you must observe polarity per the marking on the device. Rated for 400 V AC and 440 V DC, with a maximum DC voltage of 500 V, this breaker fits into 230/400 VAC three-phase panels or 440 VDC railway auxiliary circuits. The sealable design lets you lock the toggle position to prevent tampering on critical circuits.
Siemens 5SY5205-7KK11 SENTRON MCB, 2P, 0.5 A, C-Curve, 10 kA
MPN5SY5205-7KK11
Siemens SENTRON 5SY5205-7KK11 miniature circuit breaker, 2-pole, 0.5 A rated current, C tripping characteristic, 10 kA breaking capacity at 400 V AC, designed for universal current and railway applications.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Application environment | universal current |
| Parameter | Value |
|---|---|
| Number of poles | 2 |
| Parameter | Value |
|---|---|
| Tripping characteristic class | C |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Width | 36 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Mounting position | any |
| Protection degree (IP) | IP20, with connected conductors |
Product details
Frequently asked questions
What is the breaking capacity of the 5SY5205-7KK11?
10 kA at 400 V AC per EN 60898, and 10 kA at DC per EN 60898-2. That covers most industrial and commercial fault levels.
Can I use this breaker for DC circuits?
Yes, it's rated for universal current (AC/DC). At DC it's rated 440 V (max 500 V) with a 10 kA breaking capacity. You must observe the polarity marking on the device when wiring DC.
What wire sizes does the 5SY5205-7KK11 accept?
Both solid and stranded conductors from 0.75 mm² up to 35 mm². The combined terminals top and bottom make wiring straightforward.
Where can I buy the 5SY5205-7KK11?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
Will the 5SY5205-7KK11 drop into a panel specified around the 5SY3132-6?
Both are 2-pole SENTRON MCBs on the same DIN-rail footprint, so the physical swap is straightforward. The key difference is the current rating and tripping curve — the 5SY5205-7KK11 is 0.5 A C-curve, while the 5SY3132-6 is a different rating. Verify the circuit's required ampacity and coordination before swapping.
MPN
5SY5205-7KK11